389955251 has 4 divisors (see below), whose sum is σ = 445663152. Its totient is φ = 334247352.

The previous prime is 389955227. The next prime is 389955283. The reversal of 389955251 is 152559983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 389955251 - 2¹⁸ = 389693107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 389955196 and 389955205.

It is not an unprimeable number, because it can be changed into a prime (389954251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27853940 + ... + 27853953.

It is an arithmetic number, because the mean of its divisors is an integer number (111415788).

Almost surely, 2^389955251 is an apocalyptic number.

389955251 is a deficient number, since it is larger than the sum of its proper divisors (55707901).

389955251 is an equidigital number, since it uses as much as digits as its factorization.

389955251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55707900.

The product of its digits is 486000, while the sum is 47.

The square root of 389955251 is about 19747.2846487815. The cubic root of 389955251 is about 730.5864125239.

The spelling of 389955251 in words is "three hundred eighty-nine million, nine hundred fifty-five thousand, two hundred fifty-one".